Related Clues:

• Wallflower-ish
• Slow to mix, say
• "Billy Don't Be ___" (1974 hit song)
• Not likely to make the first move
• Reluctant to meet people, say
• Start suddenly
• 'Once bitten, twice ___'
• "Don't try to be __"
• Reluctant to mix
• Hesitant to ask that pretty girl to dance, say
• 'Don't be ___'
• Averse to mixing
• 'Billy, Don't Be --' (1974 pop hit)
• 'No man is to his valet' --
• Bashful or timid